Stop motion for textile machinery for processing slivers, roves, or yarns



June 27, 1967 H. HALLEUX 3,327,464

STOP MOTION FOR TEXTILE MACHINERY FOR PROCESSING SLIVERS, ROVES, ORYARNS Filed Oct. 23, 1964 5 Sheets-Sheet l June 27, 1967 Filed 001;.215, 1964 H. HALLEUX TILE R0 3,32 7,464 NERY FOR R YARNS 3 Sheets-Sheet2 STOP MOTION FOR PROCESSING SLIV H. HALLEUX STOP MOTION FOR TEXTILEMACHINERY FOR PROCESSING SLIVERS, ROVES, OR YARNS June 27, 1967 3Sheets-Sheet 5 Filed Oct. 23, 1964 United States Patent 3,327,464 STOPMOTION FOR TEXTILE MACHINERY FOR PROCESSING SLIVERS, ROVES, OR YARNSHubert Halleux, Mulhouse, Haut-Rhin, France, assignor to SocieteAlsacienne de Constructions Mecaniqucs, Mulllouse, Haut-Rhin, France, acompany of France Filed Oct. 23, 1964, Ser. No. 406,052 Claims priority,application France, Oct. 24, 1963, 951,600 3 Claims. (Cl. 57-83) Thisinvention relates to textile machinery for processin slivers, roves, oryarns, such machines consisting of a series of stations each of whichcomprises first means, such as a drawing device, for feeding secondmeans, such as a spinning spindle, the first means of each station beingdriven by a common drive means, an example being a shaft co-extensivewith the full length of machine.

In what follows, reference will often be made hereinafter only todrawing devices and spinning spindles for greater clarity, but it is tobe understood that other means for processing the slivers, roves oryarns may be used.

When the sliver, rove or yarn in one of the stations breaks between exitfrom the drawing device and entry into the corresponding spinningspindle equipment, overfeeding occurs therebetween, whereas all theother stations of the machine are capable of continuing to worknormally.

Two different solutions have already been put forward for solving thisproblem, to wit, halt the machine in order to repair the breakage, orelse resort to means for absorbing the excess material fed in.

Shutting down the whole machine will make all of the stations includingthe failed station irnproductive, which is manifestly highly detrimentalto effective operation.

Among the means of absorbing the excess feed material, so-calledswallower cylinders and suction systems have already been resorted to,but these obviously lead to waste material which it is imperative toreduce as far as possible.

This invention has for its object to provide means for individuallypreventing each drawing device from continuing to feed its associatedspindle after the rove has broken therebetween.

The subject machine of this invention is characterized in thateachstation is provided with a separate stop motion device activatedupon asliver, rove or yarn breaking, which is positioned between thedrawing device and the spindle device and which controls means forstopping feeding of the sliver, rove or yarn in the station concernedwithout halting the advance of said sliver, rove or yarn in the otherstations.

In one specific constructional form, the link between the first deviceof each station and the common drive means referred to precedinglycomprises a coupling releasable in response to actuation of anindividual stop' motion device each time a break occurs.

Where said common drive means is a shaft co-extensive with the machinethroughout its entire length, each coupling comprises a driving dogwhich is rigidly connected to a part keyed to said shaft and which drivea pawl pivotally connected to a plate which is in turn coaxiallypivotable on a. drum which rotates loosely on said shaft and which isconnected to the first device to be driven of the station underconsideration, said pawl being urged toward its position of engagementwith said dog by a cam rigid with said drum, responsively to a springinterconnecting the drum and the plate, which'plate is proice vided witha ratchet positioned whereby to be arrestable by a retractable arrestingstop which is fetched into its operative position responsively to saidstop motion device, in such manner that when said abutment suddenlystops the plate, the dog, which is still positively driven by the driveshaft, repels the pawl by causing it to pivot against the bias of itsreturn spring, whereby the coupling between said shaft and the drumlinked to the device to be driven is interrupted.

The description which follows of a form of embodiment of an improvedcontinuous spinning machine, with reference to the accompanyingnon-limitative exemplary drawings, will give a clear understanding ofhow the invention can be carried into practice.

In the drawings,

FIGURE 1 shows in plan View, with cutaway portions, a part of thedrawing device of the machine, the upper intermediate pressure rolls andthe sleeves thereof having been removed for greater clarity,

FIGURE 2 is a section taken through the line IIII of FIGURE 1,

FIGURE 3 is a section taken through the line III-III of FIGURE 1,

FIGURE 4 is a partial section taken through the line IVIV of FIGURE 3,and

FIGURE 5 shows a detail of FIGURE 3.

Referring to the accompanying drawings, the continuous spinning machinefragmentally illustrated thereon .comprises a number of drawing stationssuch as P1, P2, etc., only two stations being shown in the drawing. Eachstation has three lower splined rolls 1, 2, 3, which cooperate withthree smooth upper pressure rolls 4, 5, 6, respectively. On rolls 2 and5 are mounted two sleeves 7 and 8, respectively. Reference numeral 10designates the rove of textile fibres passing into the drawing station.

In the manner well known per se, the three upper pressure rolls 4, 5 and6 of the drawing station P1, for instance, are mounted on shafts commonto the corresponding three upper pressure rolls of the adjacent stationP2, the three shafts being carried on a common pressure arm 12 pivotallymounted on the machine frame, whereby it may be raised if necessary inorder to enable the upper rolls to be moved away from the lower rolls.

The three pressure rolls 4, 5 and 6 are freely rotatable and arefrictionally driven by the cooperating positively driven lower rolls.

All the lower drawing or exit rolls of each station (such as therolls 1) are accordingly mounted on a common drive shaft 14 which iscoextensive with the machine throughout its entire length and is drivenby any convenient power means (not shown).

The other two lower rolls of each station (such as the rolls 2 and 3)are driven through a special transmission system by a further shaft 15which is likewise coextensive with the full length to the spinningmachine and which is permanently coupled to the shaft 14 through a trainof gears 16, 17, 18, 19 (see FIGURE 1). The total number of gearwheelsin this train is an even number,

whereby the shaft 15 rotates in the opposite direction to the shaft 14.

Mounted loosely on shaft 15 is a sleeve 22 bearing thereon a gearwheel23 which meshes simultaneously with two gearwheels 24, 25 (see alsoFIGURE 2) rigidly connected to the lower rolls 2, 3, respectively.

A drum 27 is mounted on the sleeve 22 and is rendered rigid therewith bylongitudinal pegs 29 which extend through a collar 31 of sleeve 22'andpenetrate into notches on the corresponding face of the hub of saiddrum. The drum 27 is positioned axially on sleeve 22 by an elastickeeper-ring 33 located in a corresponding groove formed in the outercylindrical surface of said sleeve and bearing against the other face ofsaid drum hub.

A disc 35, which is rendered rigid with the shaft 15 by a key 36,carries one or more dogs 38 (shown as numbering two in the illustratedexample) normally in en gagement with a pawl 41 pivotally mounted on apin 42 rigidly connected to a plate 28 which is mounted loosely on thehub of drum 27. The pin 42 extends with a large clearance through a wideopening 43 formed in the web of drum 27.

The end of the pawl 41 remote from its pivot carries a follower 45engaging with a radial cam groove 46 which is likewise formed in the hubof drum 27 (see also FIG- URE The drum 27 is urged to rotate in theopposite direction to the arrow 1 relatively to the plate 28, by areturn spring 48 one of whose ends is fastened to a stub 49 rigid withplate 28 and the other end to .a stub 51 rigid with drum 27.

The periphery of plate 28 has formed thereon notches 53, with which aretractable stop 54 is adapted to engage whereby to prevent rotation ofsaid plate. When this stop is in the inoperative position shown in solidlines in FIGURE 3 it allows the plate 28 to rotate freely, whereas whenit is in its operative position shown in broken lines it engages withone of said notches and prevents rotation of said plate.

The retractable stop 54 is actuated by a mechanical or (as assumedherein) electromagnetic system governed by a stop motion deviceresponsive to a rove-breaking 56, which comprises an electric contact 61activated by a feeler 57 terminating in a rove guide 58. On issuing fromthe drawing station the rove runs over a guide 59 before passing throughthe rove guide 58.

The electromagnetic device 55 for actuating the retractable stop 54basically comprises an electromagnet 63 whose moving core 64 isconnected through a link 65 to an extension of the retractable stop 54,which stop pivots about a pin 66. A retractile spring 68 urges the stop54 into its inoperative retracted position, while on being energized theelectromagnet moves said stop into its lower operative position againstthe bias of said spring. The coil of electromagnet 63 is energized by asuitable source of current S, under control of the stop motion deviceeleotric contact 61.

The operation of the system hereinbefore described as the following:

In normal operation the primary drive shaft 14, which rotatescontinuously, in turn continuously rotates the shaft through the trainof gears 16, 17, 18, 19. The rove 10, when normally fed between thedrawing device and the spinning spindle, exerts a uniform pressure onthe yarn-guide 58 of feeler 57, whereby the stop 54 is maintained in itsretracted position and one of the dogs 38 of disc 35, which rotates inthe direction of arrow f1 moves the pawl 41 along with it. Beingpivotally mounted about the pin 42, the pawl 41 rotates the plate 28and, through the agency of spring 48, also rotates the drum 27 and thesleeve 22 rigid therewith. The gearwheel 23 rigid with said sleeve isthus made to rotate the lower restraining and feed rolls 2 and 3,respectively, of the drawing station.

The return spring 48 tends to rotate drum 27 in the opposite directionto arrow f1 relatively to the plate 28, i.e. relatively to the pawl,thereby causing the cam 46 of said drum to tend to make the pawl 41pivot outwardly, i.e. in the direction whereby it is kept engaged withthe dog 38 driving it.

Should the rove break on emerging from the drawing device, the contact61 of stop motion device 56 closes and causes the stop 54 to drop intoits operative position and to halt the plate 28 sharply and positively.The pivoting pin 42 of said pawl is thus immobilized in space,

whilst the dog 38 rigid with disc 35, which continues to be rotated atthe same speed by the continuously rotating shaft 15 with which it isintegral, repels the movable end of pawl 41 and constrains it to movetoward the axis of the system and, through the cam 46, to consequentlyrotate the drum 27 in the direction of arrow f1, relatively to thestationary plate 28 and against the countering force of its returnspring 48. This motion disengages the pawl from the dog 38, whichcontinues to rotate, whereas the drum 27 stops rotating and the lowerrestraining and feed rolls 2 and 3, respectively, of the drawing deviceare halted. The drawing roll 1 continues to rotate, but this has noeffect since no more rove is being fed between the drawing rolls.

Although the drawing station under consideration has stopped operatingall the remaining stations of the machine continue to operate normally,so that the output of the machine is not appreciably reduced. Thus whena breakage occurs, the end of the feeler 57, for instance, is raisedmanually, thereby returning the stop 54 into its upper retractedposition and causing the various other parts to revert to their initialpositions; thus, when the disc 35 describes its next half-revolution oneof its dogs 38 engages anew with the pawl 41 and causes the drawingprocess to be operative once more, thereby enabling the broken rove tobe joined up again and the feeler 57 to be released 'as soon as thepressure of the rove thereagainst is sufficient.

While there has been shown and described, the presently preferredembodiment of the improved spinning machine of this invention, it willbe well understood by those skilled in the art that various changes andmodifications may be made in this embodiment to suit specificapplications. It is, therefore, to be understood that the descriptionhereinbefore set forth is not be considered a limitation of theinvention, but that changes may be made within the spirit and scope ofthe invention as set forth of the appended claims.

What is claimed is:

1. In a drawing device for a spinning machine of the type which includesa continuously operative drive shaft; at least one roll driven by saidshaft; and stop motion means interposed between said shaft and said rollfor interrupting the output of said drawing device, the improvementwherein said stop motion means comprises: a driving member fast on saidshaft, a driving dog fixedly secured to said driving member, a drumfreely rotatably mounted on said shaft, said drum being continuouslyconnected to drive said roll, a circular plate member freely rotatablymounted on said drum coaxially therewith, a pawl pivotally mounted onsaid plate member and normally engaging said dog to be driven thereby,cam means carried by said drum for controlling said pawl, resilientmeans interconnecting said drum and said plate member and yieldinglyurging said cam means to maintain said pawl in driving engagement withsaid dog; sensing means at the output of said drawing device, saidsensing means being responsive to breakage of the product emerging fromsaid drawing device; and stop means controlled by said sensing means,said stop means acting on said plate member to stop rotation thereof andthereby actuate said cam means to disengage said pawl from said dog.

2. A device according to claim 1, wherein said drum includes a webportion intermediate its hub and its periphery, said web portion havingan elongated slot formed therein which extends generally radially withrespect to the rotational axis of said drum, said cam means comprisingthe lateral edges of said slot and a cooperating follower memberslidable longitudinally of said slot and engageable with said lateraledges.

3. A device according to claim 1, wherein said sensing means includeselectrical contact means, in which said stop means comprises anelectromagnet controlled by said contact means and a stop memberactuated by said electromagnet, said plate member carrying means en- 5 6gage able with said stop member to stop said rotation in 1,462,8967/1823 Barksdale et a1 57-83 response to said breakage of said product.1,531,457 3/ 1925 Skowyra 57-83 2,623,346 12/1952 Lohfert 612 211 57-83X References Cited 2,623,348 12/1952 Bade 57-83 UNITED STATES PATENTS 5232,240 9/1880 Colman 57 83 FRANK J. COHEN, Primary Examiner.

351 59 10 1 Shaw 57 3 J. PETRAKES, Assistant Examiner.

1. IN A DRAWING DEVICE FOR A SPINNING MACHINE OF THE TYPE WHICH INCLUDESA CONTINUOUSLY OPERATIVE DRIVE SHAFT; AT LEAST ONE ROLL DRIVEN BY SAIDSHAFT; AND STOP MOTION MEANS INTERPOSED BETWEEN SAID SHAFT AND SAID ROLLFOR INTERRUPTING THE OUTPUT OF SAID DRAWING DEVICE, THE IMPROVEMENTWHEREIN SAID STOP MOTION MEANS COMPRISES: A DRIVING MEMBER FAST ON SAIDSHAFT, A DRIVING DOG FIXEDLY SECURED TO SAID DRIVING MEMBER, A DRUMFREELY ROTATABLY MOUNTED ON SAID SHAFT, SAID DRUM BEING CONTINUOUSLYCONNECTED TO DRIVE SAID ROLL, A CIRCULAR PLATE MEMBER FREELY ROTATABLYMOUNTED ON SAID DRUM COAXIALLY THEREWITH, A PAWL PIVOTALLY MOUNTED ONSAID PLATE MEMBER AND NORMALLY ENGAGING SAID DOG TO BE DRIVEN THEREBY,CAM MEANS CARRIED BY SAID DRUM FOR CONTROLLING SAID PAWL, RESILIENTMEANS INTERCONNECTING SAID DRUM AND SAID PLATE MEMBER AND YIELDINGLYURGING SAID CAM MEANS TO MAINTAIN SAID PAWL IN DRIVING ENGAGEMENT WITHSAID DOG; SENSING MEANS AT THE OUTPUT OF SAID DRAWING DEVICE, SAIDSENSING MEANS